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Ternary Quantum Dots

Ternary Quantum Dots
  • Author : Samuel Oluwatobi Oluwafemi,El Hadji Mamour Sakho,Sundararajan Parani,Thabang Calvin Lebepe
  • Publisher :Unknown
  • Release Date :2021-07-02
  • Total pages :280
  • ISBN : 9780128183045
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Summary : Ternary Quantum Dots: Synthesis, Properties, and Applications reviews the latest advances in ternary (I-III-VI) chalcopyrite quantum dots (QDs), along with their synthesis, properties and applications. Sections address the fundamental key concepts of ternary quantum dots, progress in synthesis strategies (i.e., organic and aqueous synthesis), and characterization methods (i.e., transmission electron microscopy, dynamic light scattering, etc.). Properties of ternary quantum dots are comprehensively reviewed, including optical, chemical and physical properties. The factors and mechanisms of the cytotoxicity of ternary quantum dot-based nanomaterials are also described. Since ternary chalcopyrite quantum dots are less toxic and more environmentally benign than conventional binary II-VI chalcogenide quantum dots, they are being investigated to replace conventional quantum dots in a range of applications. Thus, this book reviews QDs in various applications, such as solar cells, photocatalytic, sensors and bio-applications. Reviews fundamental concepts of ternary quantum dots and quantum dot-nanocomposites including the most relevant synthesis strategies, key properties, and characterization techniques Delves into the cytotoxicity of quantum dots looking at the factors and mechanisms that influence cytotoxicity including demonstration of cytotoxicity assays for in vitro and in vivo tests Touches on the many applications of ternary quantum dots including biomedical applications, applications in solar cells, sensing applications, and photocatalytic applications

Ternary I-III-VI Quantum Dots Synthesis, Modification and Immobilization for Optical Applications

Ternary I-III-VI Quantum Dots Synthesis, Modification and Immobilization for Optical Applications
  • Author : Krzysztof Guguła
  • Publisher :Unknown
  • Release Date :2016
  • Total pages :229
  • ISBN : OCLC:961837224
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Summary :

Ternary Quantum Dots

Ternary Quantum Dots
  • Author : Oluwatobi Samuel Oluwafemi,El Hadji Mamour Sakho,Sundararajan Parani,Thabang Calvin Lebepe
  • Publisher :Unknown
  • Release Date :2021-07-15
  • Total pages :375
  • ISBN : 9780128183038
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Summary : Ternary Quantum Dots: Synthesis, Properties, and Applications reviews the latest advances in ternary (I-III-VI) chalcopyrite quantum dots (QDs) as well as their synthesis, properties, and applications. First, the book addresses the fundamental key concepts of ternary quantum dots. Recent progress in synthesis strategies (i.e. organic and aqueous synthesis) and characterization methods (i.e. transmission electron microscopy, dynamic light scattering, etc.) are discussed. Properties of ternary quantum dots are comprehensively reviewed including optical, chemical and physical properties. The factors and mechanisms of the cytotoxicity of ternary quantum dot-based nanomaterials are described. Since ternary chalcopyrite quantum dots are less toxic and more environmentally benign than conventional binary II-VI chalcogenide quantum dots, they are being investigated to replace conventional quantum dots in a range of applications. Thus, this book reviews QDs in various applications such as solar cells, photocatalytic, sensors and bio-applications. Key Features: Reviews fundamental concepts of ternary quantum dots and quantum dot-nanocomposites including the most relevant synthesis strategies, key properties, and characterization techniques Delves into the cytotoxicity of quantum dots looking at the factors and mechanisms that influence cytotoxicity including demonstration of cytotoxicity assays for in vitro and in vivo tests Touches on the many applications of ternary quantum dots including biomedical applications, applications in solar cells, sensing applications, and photocatalytic applications Ternary Quantum Dots will be valuable for material scientists, physicists, chemists, engineers and especially those working in nanotechnology.

Optical High Pressure Studies of Ternary Semiconducting Nanocrystals: Quantum Dots

Optical High Pressure Studies of Ternary Semiconducting Nanocrystals: Quantum Dots
  • Author : Markus R. Silvestri
  • Publisher :Unknown
  • Release Date :1994
  • Total pages :187
  • ISBN : OCLC:1150118912
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Summary :

Colloidal Quantum Dot Optoelectronics and Photovoltaics

Colloidal Quantum Dot Optoelectronics and Photovoltaics
  • Author : Gerasimos Konstantatos,Edward H. Sargent
  • Publisher :Unknown
  • Release Date :2013-11-07
  • Total pages :327
  • ISBN : 9780521198264
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Summary : Captures the most up-to-date research in the field, written in an accessible style by the world's leading experts.

Spectroscopic Analyses

Spectroscopic Analyses
  • Author : Eram Sharmin,Fahmina Zafar
  • Publisher :Unknown
  • Release Date :2017-12-06
  • Total pages :240
  • ISBN : 9789535136279
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Summary : The book presents developments and applications of these methods, such as NMR, mass, and others, including their applications in pharmaceutical and biomedical analyses. The book is divided into two sections. The first section covers spectroscopic methods, their applications, and their significance as characterization tools; the second section is dedicated to the applications of spectrophotometric methods in pharmaceutical and biomedical analyses. This book would be useful for students, scholars, and scientists engaged in synthesis, analyses, and applications of materials/polymers.

Ionizing Radiation Effects and Applications

Ionizing Radiation Effects and Applications
  • Author : Boualem Djezzar
  • Publisher :Unknown
  • Release Date :2018-03-28
  • Total pages :186
  • ISBN : 9789535139539
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Summary : The benefits of ionizing radiations have been largely demonstrated through many achievements of human life. Understanding the fundamental elementary interactions of ionizing radiations with material has allowed the development of various applications needed by different industries. This book draws some facets of their applications, such as hardening process for semiconductor devices, biomedical imaging by radiation luminescent quantum dots, hydrogen gas detection by Raman lidar sensor for explosion risk assessment, water and wastewater purification by radiation treatment for environment, doping by the neutron transmutation doping for the semiconductor industry, and polymerization by irradiation, which is useful for industries requiring resistant and protective coating. I wish the chapters of this book can provide some helpful information on ionizing radiation applications.

Cadmium Telluride Quantum Dots

Cadmium Telluride Quantum Dots
  • Author : John Donegan,Yury Rakovich
  • Publisher :Unknown
  • Release Date :2013-12-03
  • Total pages :248
  • ISBN : 9789814316057
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Summary : In the last two decades, semiconductor quantum dots—small colloidal nanoparticles—have garnered a great deal of scientific interest because of their unique properties. Among nanomaterials, CdTe holds special technological importance as the only known II–VI material that can form conventional p–n junctions. This makes CdTe very important for the development of novel optoelectronic devices such as light-emitting diodes, solar cells, and lasers. Moreover, the demand for water-compatible light emitters and the most common biological buffers give CdTe quantum dots fields a veritable edge in biolabeling and bioimaging. Cadmium Telluride Quantum Dots: Advances and Applications focuses on CdTe quantum dots and addresses their synthesis, assembly, optical properties, and applications in biology and medicine. It makes for a very informative reading for anyone involved in nanotechnology and will also benefit those scientists who are looking for a comprehensive account on the current state of quantum dot–related research.

Computational Advancement in Communication Circuits and Systems

Computational Advancement in Communication Circuits and Systems
  • Author : Koushik Maharatna,Maitreyi Ray Kanjilal,Sukumar Chandra Konar,Sumit Nandi,Kunal Das
  • Publisher :Unknown
  • Release Date :2019-07-25
  • Total pages :414
  • ISBN : 9789811386879
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Summary : This book gathers the proceedings of the International Conference on Computational Advancement in Communication Circuits and Systems (ICCACCS 2018), which was organized by Narula Institute of Technology under the patronage of the JIS group, affiliated with West Bengal University of Technology. The book presents peer-reviewed papers that highlight new theoretical and experimental findings in the fields of electronics and communication engineering, including interdisciplinary areas like Advanced Computing, Pattern Recognition and Analysis, and Signal and Image Processing. The respective papers cover a broad range of principles, techniques and applications in microwave devices, communication and networking, signal and image processing, computations and mathematics, and control. The proceedings reflect the conference’s strong emphasis on methodological approaches, and focus on applications within the domain of Computational Advancement in Communication Circuits and Systems. They also address emerging technologies in electronics and communication, together with the latest practices, issues and trends.

One-Dimensional Nanostructures

One-Dimensional Nanostructures
  • Author : Zhiming M Wang
  • Publisher :Unknown
  • Release Date :2008-07-20
  • Total pages :330
  • ISBN : 9780387741321
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Summary : One-dimensional (1D) nanostructures, including nanowires, nanotubes and quantum wires, have been regarded as the most promising building blocks for nanoscale electronic and optoelectronic devices. This book presents exciting, state-of-the-art developments in synthesis and properties of 1D nanostructures with many kinds of morphologies and compositions as well as their considerable impact on spintronics, information storage, and the design of field-effect transistors.

Novel Three-state Quantum Dot Gate Field Effect Transistor

Novel Three-state Quantum Dot Gate Field Effect Transistor
  • Author : Supriya Karmakar
  • Publisher :Unknown
  • Release Date :2013-11-20
  • Total pages :134
  • ISBN : 9788132216353
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Summary : The book presents the fabrication and circuit modeling of quantum dot gate field effect transistor (QDGFET) and quantum dot gate NMOS inverter (QDNMOS inverter). It also introduces the development of a circuit model of QDGFET based on Berkley Short Channel IGFET model (BSIM). Different ternary logic circuits based on QDGFET are also investigated in this book. Advanced circuit such as three-bit and six bit analog-to-digital converter (ADC) and digital-to-analog converter (DAC) were also simulated.

Quantum Dot Optoelectronic Devices

Quantum Dot Optoelectronic Devices
  • Author : Peng Yu,Zhiming M. Wang
  • Publisher :Unknown
  • Release Date :2020-04-16
  • Total pages :326
  • ISBN : 9783030358136
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Summary : This book captures cutting-edge research in semiconductor quantum dot devices, discussing preparation methods and properties, and providing a comprehensive overview of their optoelectronic applications. Quantum dots (QDs), with particle sizes in the nanometer range, have unique electronic and optical properties. They have the potential to open an avenue for next-generation optoelectronic methods and devices, such as lasers, biomarker assays, field effect transistors, LEDs, photodetectors, and solar concentrators. By bringing together leaders in the various application areas, this book is both a comprehensive introduction to different kinds of QDs with unique physical properties as well as their preparation routes, and a platform for knowledge sharing and dissemination of the latest advances in a novel area of nanotechnology.

Electrochemical and Optical Modulation of Selenide and Telluride Ternary Alloy Quantum Dots Genosensors

Electrochemical and Optical Modulation of Selenide and Telluride Ternary Alloy Quantum Dots Genosensors
  • Author : Peter Munyao Ndangili
  • Publisher :Unknown
  • Release Date :2011
  • Total pages :636
  • ISBN : OCLC:922968856
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Summary : Electroanalytical and optical properties of nanoscale materials are very important for biosensing applications as well as for understanding the unique one-dimensional carrier transport mechanism. One-dimensional semiconductor nanomaterials such as semiconductor quantum dots are extremely attractive for designing high-density protein arrays. Because of their high surface-to-volume ratio, electro-catalytic activity as well as good biocompatibility and novel electron transport properties make them highly attractive materials for ultra-sensitive detection of biological macromoleculcs via bio-electronic or bio-optic devices. A genosensor or gene based biosensor is an analytical device that employs immobilized deoxyribonucleic acid (DNA) probes as the recognition element and measures specific binding processes such as the formation of deoxyribonucleic acid-deoxyribonucleic acid (DNA-DNA), deoxyribonucleic acid- ribonucleic acid (DNA-RNA) hybrids, or the interactions between proteins or ligand molecules with DNA at the sensor surface. In this thesis, I present four binary and two ternary-electrochemically and optically modulated selenide and telluride quantum dots, all synthesised at room temperature in aqueous media. Cationic gallium (Ga3 ) synthesized in form of hydratcd gallium perchloratc salt [Ga(CI04)3.6H20] from the reaction of hot perchloric acid and gallium metal was used to tailor the optical and electrochemical properties of the selenide and telluride quantum dots. The synthesized cationic gallium also allowed successful synthesis of novel water soluble and biocompatible capped gallium selenide nanocrystals and gallium telluride quantum dots.

Theoretical Studies of Atomic Transport in Ternary Semiconductor Quantum Dots and Charge Transport in Organic Photovoltaic Active Layers

Theoretical Studies of Atomic Transport in Ternary Semiconductor Quantum Dots and Charge Transport in Organic Photovoltaic Active Layers
  • Author : Xu Han
  • Publisher :Unknown
  • Release Date :2016
  • Total pages :229
  • ISBN : OCLC:945442748
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Summary : Ternary semiconductor quantum dots with thermodynamically stable structures are particularly important for achieving optimal performance in optoelectronic and photovoltaic applications. Ternary quantum dots (TQDs) are typically synthesized in the form of core/shell structures. However, misfit strain induced by the abrupt core/shell interface can change the nature of the TQDs dramatically, leading to unstable optoelectronic function. In this thesis, a transient species transport model is developed to predict species distributions in TQDs during their thermal annealing. Specifically, the interdiffusion kinetics is analyzed of group-VI species in ZnSe1-xSx and ZnSe1-xTex TQDs and of group-III species in InxGa1-xAs TQDs. The modeling results are used to interpret the evolution of near-surface species concentration during thermal annealing and predict the equilibrium species distribution as a function of TQD size and composition. A database of constituent species transport properties is generated for further design of post-growth processes that enables the development of thermodynamically stable TQD structures with optimal optoelectronic function grown through simple one-step colloidal synthesis techniques. Nanoparticle assemblies of organic semiconducting materials are particularly appealing for next-generation organic photovoltaic (OPV) devices because their low-cost aqueous synthesis reduces the usage of chlorinated solvents. Another class of novel semiconducting materials, organometallic halide perovskites, have emerged as promising materials for solar cells because of their high photo-absorption coefficient and high power conversion efficiency (PCE). Based on deterministic charge carrier transport models, this thesis presents a computational analysis of charge transport in photovoltaic devices with active layers of the above two types of materials and develops design protocols for improving photovoltaic device efficiency. Our results demonstrate that charge transport efficiencies in centrifuged organic nanoparticle assemblies are comparable with those in drop cast thin films. The effects on charge transport of excess stabilizing surfactant molecules and dispersion of insulating nanoparticles in the assemblies have been analyzed. The simulation results accurately reproduce experimental data and provide interpretations for the observed effects of the active layer nanostructure, i.e., nanoparticle size, ratio, and internal morphology, on charge transport and device PCE. Furthermore, the charge generation rate in the active layer is maximized and the device's photovoltaic performance is optimized with respect to the OPV device parameters. For photovoltaic devices based on organometallic halide perovskites, the modeling results demonstrate quantitatively that incorporation of multi-walled carbon nanotubes (MWCNTs) into the perovksite layer reduces bimolecular recombination, thus increasing the device's PCE. In addition, we find that electronic band offsets play an important role in determining the effects on device performance of the charge carrier mobilities and of majority doping in the electron and hole transporting layers (ETLs and HTLs). The modeling results provide guidelines for designing hybrid perovskite photovoltaic devices with enhanced photovoltaic performance.

Handbook of Smart Materials in Analytical Chemistry

Handbook of Smart Materials in Analytical Chemistry
  • Author : Miguel de la Guardia,Francesc A. Esteve-Turrillas
  • Publisher :Unknown
  • Release Date :2019-01-24
  • Total pages :1000
  • ISBN : 9781119422594
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Summary : A comprehensive guide to smart materials and how they are used in sample preparation, analytical processes, and applications This comprehensive, two-volume handbook provides detailed information on the present state of new materials tailored for selective sample preparation and the legal frame and environmental side effects of the use of smart materials for sample preparation in analytical chemistry, as well as their use in the analytical processes and applications. It covers both methodological and applied analytical aspects, relating to the development and application of new materials for solid-phase extraction (SPE) and solid-phase microextraction (SPME), their use in the different steps and techniques of the analytical process, and their application in specific fields such as water, food, air, pharmaceuticals, clinical sciences and forensics. Every chapter in Handbook of Smart Materials in Analytical Chemistry is written by experts in the field to provide a comprehensive picture of the present state of this key area of analytical sciences and to summarize current applications and research literature in a critical way. Volume 1 covers New Materials for Sample Preparation and Analysis. Volume 2 handles Analytical Processes and Applications. Focuses on the development and applications of smart materials in analytical chemistry Covers both, methodological and applied analytical aspects, for the development of new materials and their use in the different steps and techniques of the analytical process and their application in specific fields Features applications in key areas including water, air, environment, pharma, food, forensic, and clinical Presents the available tools for the use of new materials suitable to aid recognition process to the sample preparation and analysis A key resource for analytical chemists, applied laboratories, and instrument companies Handbook of Smart Materials in Analytical Chemistry, 2V Set is an excellent reference book for specialists and advanced students in the areas of analytical chemistry, including both research and application environments.

A Study on Long Term Stability of Quantum Dot Sensitized Solar Cells

A Study on Long Term Stability of Quantum Dot Sensitized Solar Cells
  • Author : Hao Yu,University of Wyoming. Department of Chemical & Petroleum Engineering
  • Publisher :Unknown
  • Release Date :2014
  • Total pages :186
  • ISBN : 130399495X
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Summary : Quantum dot sensitized solar cells (QDSSCs) are recognized as a promising new technology for making cost efficient photovoltaic devices. In this project, QDSSCs are based on CdSe quantum dots (QDs) attached to ternary zinc tin oxide (ZTO) nanowires. Ternary oxides are of interest because they afford a wide latitude for compositional tuning of semiconductor properties. In any device that is to be subjected to the conditions of field deployment, the long term stability of all components of the device must be assured. Processes such as QD detachment or QD-nanowire dissolution and corrosion might significantly degrade solar cell performance over time. In this dissertation, stability aspects of QDSSCs are examined in detail, from the dissolution and alteration of ternary oxide materials to the attachment, detachment and dissolution of QDs on oxide surfaces. We find that ZTO is likely to survive long-term deployment, but that small amounts of surface alteration will take place. More importantly, solution-based QDs capped with organic stabilizing molecules demonstrate ligand-dependent attachment and detachment behaviors but are less prone to dissolution. Pulsed laser deposited QDs, however, are prone to longer-term dissolution. Post-deposition capping molecules could improve stability but might inhibit electron transfer. Long-term QDSSC stability is a balance between protection of key materials but avoiding inhibition of electron transfer needed for solar cell operation.

Nanoscience: Volume 6

Nanoscience: Volume 6
  • Author : Neerish Revaprasadu
  • Publisher :Unknown
  • Release Date :2020-05-21
  • Total pages :173
  • ISBN : 9781788016933
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Summary : The field of nanoscience continues to grow and, with such a vast landscape of material, careful distillation of the most important discoveries will help researchers find the key information they require. Nanoscience provides a critical and comprehensive assessment of the most recent research and opinion from across the globe. Topics covered in this volume include metal halide perovskite nanomaterials, properties and applications, nanoparticles and nanocomposites for new permanent magnets and graphene-based materials for energy conversion applications. Anyone practising in any nano-allied field, or wishing to enter the nano-world will benefit from this resource, presenting the current thought and applications of nanoscience.

Nonmagnetic and Magnetic Quantum Dots

Nonmagnetic and Magnetic Quantum Dots
  • Author : Vasilios N. Stavrou
  • Publisher :Unknown
  • Release Date :2018-04-04
  • Total pages :246
  • ISBN : 9789535139591
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Summary : The book entitled Nonmagnetic and Magnetic Quantum Dots is divided into two sections. In Section 1, the chapters are related to nonmagnetic quantum dots and their applications. More specifically, exact models and numerical methods have been presented to describe the analytical solution of the carrier wave functions, the quantum mechanical aspects of quantum dots, and the comparison of the latter to experimental data. Furthermore, methods to produce quantum dots, synthesis techniques of colloidal quantum dots, and applications on sensors and biology, among others, are included in this section. In Section 2, a few topics of magnetic quantum dots and their applications are presented. The section starts with a theoretical model to describe the magnetization dynamics in magnetic quantum dot array and the description of dilute magnetic semiconducting quantum dots and their applications. Additionally, a few applications of magnetic quantum dots in sensors, biology, and medicine are included in Section 2.

Core/Shell Quantum Dots

Core/Shell Quantum Dots
  • Author : Xin Tong,Zhiming M. Wang
  • Publisher :Unknown
  • Release Date :2020-07-01
  • Total pages :323
  • ISBN : 9783030465964
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Summary : This book outlines various synthetic approaches, tuneable physical properties, and device applications of core/shell quantum dots (QDs). Core/shell QDs have exhibited enhanced quantum yield (QY), suppressed photobleaching/blinking, and significantly improved photochemical/physical stability as compared to conventional bare QDs. The core-shell structure also promotes the easy tuning of QDs’ band structure, leading to their employment as attractive building blocks in various optoelectronic devices. The main objective of this book is to create a platform for knowledge sharing and dissemination of the latest advances in novel areas of core/shell QDs and relevant devices, and to provide a comprehensive introduction and directions for further research in this growing area of nanomaterials research.

Emerging Photovoltaic Technologies

Emerging Photovoltaic Technologies
  • Author : Carl S. Ponseca
  • Publisher :Unknown
  • Release Date :2020-01-31
  • Total pages :374
  • ISBN : 9781000021769
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Summary : The need to address the energy problem and formulate a lasting solution to tame climate change has never been so urgent. The rise of various renewable energy sources, such as solar cell technologies, has given humanity a glimpse of hope that can delay the catastrophic effects of these problems after decades of neglect. This review volume provides in-depth discussion of the fundamental photophysical processes as well as the state-of-the-art device engineering of various emerging photovoltaic technologies, including organic (fullerene, non-fullerene, and ternary), dye-sensitized (ruthenium, iron, and quantum dot), and hybrid metal-halide perovskite solar cells. The book is essential reading for graduate and postgraduate students involved in the photophysics and materials science of solar cell technologies.

Handbook of Nanophysics

Handbook of Nanophysics
  • Author : Klaus D. Sattler
  • Publisher :Unknown
  • Release Date :2016-04-19
  • Total pages :716
  • ISBN : 1420075454
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Summary : In the 1990s, nanoparticles and quantum dots began to be used in optical, electronic, and biological applications. Now they are being studied for use in solid-state quantum computation, tumor imaging, and photovoltaics. Handbook of Nanophysics: Nanoparticles and Quantum Dots focuses on the fundamental physics of these nanoscale materials and structures. Each peer-reviewed chapter contains a broad-based introduction and enhances understanding of the state-of-the-art scientific content through fundamental equations and illustrations, some in color. This volume provides an overview of the major categories of nanoparticles, including amorphous, magnetic, ferroelectric, and zinc oxide nanoparticles; helium nanodroplets; and silicon, tetrapod-shaped semiconductor, magnetic ion-doped semiconductor, and natural polysaccharide nanocrystals. It also describes their properties and interactions. In the group of chapters on nanofluids, the expert contributors discuss the stability of nanodispersions, liquid slip at the molecular scale, thermophysical properties, and heat transfer. They go on to examine the theory, self-assembly, and teleportation of quantum dots. Nanophysics brings together multiple disciplines to determine the structural, electronic, optical, and thermal behavior of nanomaterials; electrical and thermal conductivity; the forces between nanoscale objects; and the transition between classical and quantum behavior. Facilitating communication across many disciplines, this landmark publication encourages scientists with disparate interests to collaborate on interdisciplinary projects and incorporate the theory and methodology of other areas into their work.